ball of the thumb中文什么意思

[网络] 大拇趾底部的肉瘤；拇指腕掌

• thumb:    n. 1.拇指。 2.【建筑】馒形饰 ...
• a rule of thumb:    概测法; 经验或实践的方法
• adduction of thumb:    拇指内收

例句与用法

1. he held up his hand, rubbing the ball of the thumb over the calloused palm and gazing at the dirt that was ingrained in the flesh itself and which no brush could scrub away
   他抬起手用拇指肚揉揉长满老茧的手掌。细看着嵌入肌理的连刷子也刷不掉的污垢。